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com_puc.c revision 1.6 
      1 /*	$NetBSD: com_puc.c,v 1.6 2002/09/30 20:37:13 thorpej Exp $	*/
      2 
      3 /*
      4  * Copyright (c) 1998 Christopher G. Demetriou.  All rights reserved.
      5  *
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  * 3. All advertising materials mentioning features or use of this software
     15  *    must display the following acknowledgement:
     16  *      This product includes software developed by Christopher G. Demetriou
     17  *	for the NetBSD Project.
     18  * 4. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 /*
     34  * Machine-independent ns16x50 serial port ('com') driver attachment to
     35  * "PCI Universal Communications" controller driver.
     36  *
     37  * Author: Christopher G. Demetriou, May 17, 1998.
     38  */
     39 
     40 #include <sys/cdefs.h>
     41 __KERNEL_RCSID(0, "$NetBSD: com_puc.c,v 1.6 2002/09/30 20:37:13 thorpej Exp $");
     42 
     43 #include <sys/param.h>
     44 #include <sys/systm.h>
     45 #include <sys/device.h>
     46 #include <sys/tty.h>
     47 
     48 #include <machine/bus.h>
     49 
     50 #include <dev/pci/pcivar.h>
     51 #include <dev/pci/pucvar.h>
     52 #include <dev/ic/comreg.h>
     53 #include <dev/ic/comvar.h>
     54 
     55 struct com_puc_softc {
     56 	struct com_softc sc_com;	/* real "com" softc */
     57 
     58 	/* puc-specific goo. */
     59 	void	*sc_ih;			/* interrupt handler */
     60 };
     61 
     62 int	com_puc_probe __P((struct device *, struct cfdata *, void *));
     63 void	com_puc_attach __P((struct device *, struct device *, void *));
     64 
     65 CFATTACH_DECL(com_puc, sizeof(struct com_puc_softc),
     66     com_puc_probe, com_puc_attach, NULL, NULL)
     67 
     68 int
     69 com_puc_probe(parent, match, aux)
     70 	struct device *parent;
     71 	struct cfdata *match;
     72 	void *aux;
     73 {
     74 	struct puc_attach_args *aa = aux;
     75 
     76 	/*
     77 	 * Locators already matched, just check the type.
     78 	 */
     79 	if (aa->type != PUC_PORT_TYPE_COM)
     80 		return (0);
     81 
     82 	return (1);
     83 }
     84 
     85 void
     86 com_puc_attach(parent, self, aux)
     87 	struct device *parent, *self;
     88 	void *aux;
     89 {
     90 	struct com_puc_softc *psc = (void *)self;
     91 	struct com_softc *sc = &psc->sc_com;
     92 	struct puc_attach_args *aa = aux;
     93 	const char *intrstr;
     94 
     95 	/*
     96 	 * XXX This driver assumes that 'com' ports attached to 'puc'
     97 	 * XXX can not be console.  That isn't unreasonable, because PCI
     98 	 * XXX devices are supposed to be dynamically mapped, and com
     99 	 * XXX console ports want fixed addresses.  When/if baseboard
    100 	 * XXX 'com' ports are identified as PCI/communications/serial
    101 	 * XXX devices and are known to be mapped at the standard
    102 	 * XXX addresses, if they can be the system console then we have
    103 	 * XXX to cope with doing the mapping right.  Then this will get
    104 	 * XXX really ugly.  Of course, by then we might know the real
    105 	 * XXX definition of PCI/communications/serial, and attach 'com'
    106 	 * XXX directly on PCI.
    107 	 */
    108 
    109 	sc->sc_iobase = aa->a;
    110 	sc->sc_iot = aa->t;
    111 	sc->sc_ioh = aa->h;
    112 	sc->sc_frequency = aa->flags & PUC_COM_CLOCKMASK;
    113 
    114 	intrstr = pci_intr_string(aa->pc, aa->intrhandle);
    115 	psc->sc_ih = pci_intr_establish(aa->pc, aa->intrhandle, IPL_SERIAL,
    116 	    comintr, sc);
    117 	if (psc->sc_ih == NULL) {
    118 		printf(": couldn't establish interrupt");
    119 		if (intrstr != NULL)
    120 			printf(" at %s", intrstr);
    121 		printf("\n");
    122 		return;
    123 	}
    124 	printf(": interrupting at %s\n", intrstr);
    125 	printf("%s", sc->sc_dev.dv_xname);
    126 
    127 	com_attach_subr(sc);
    128 }
    129